JP7030428B2 - Paper container manufacturing equipment, paper container manufacturing method and paper container - Google Patents

Description

The present invention relates to a paper container manufacturing apparatus, in particular, a paper container manufacturing apparatus formed by at least a heating step and a subsequent molding step, a method for manufacturing a paper container using the paper container manufacturing apparatus, and the paper container. It relates to a paper container obtained by the manufacturing equipment of.

FIG. 11 is a perspective view showing the external shape of a conventional paper container.

With reference to the figure, the paper container 70 has a square bottom portion 71, a side wall portion 72 extending upward from the outer edge of the bottom portion 71, a corner portion 74 connecting the side wall portions 72 to each other, and a side wall portion 72 and a corner portion 74. It is composed of an edge winding 73 formed on the outer edge of the paper. The paper container 70 is formed by press-molding one blank sheet.

Such a press-molded paper container is lightweight and cost-effective, and is therefore mainly used for storing food. Various press-molded manufacturing devices for manufacturing such paper containers have been proposed (for example, Patent Document 1).

FIG. 12 is a schematic view showing a conventional paper container manufacturing apparatus, FIG. 13 is a schematic view showing a base paper processing process in the paper container manufacturing apparatus shown in FIG. 12, and FIG. 13 (1) is a base paper. The state immediately after the supply position (B1) is shown, (2) shows the state immediately after the ruled line forming position (B2), and (3) shows the state immediately after the punching / pressing position (B3). It shows.

With reference to FIG. 12, the conventional paper container manufacturing apparatus 80 includes a supply device 81 for supplying a strip-shaped base paper 77 on the upstream side thereof. Further, a molding device 83 is arranged on the downstream side of the supply device 81, and the molding device 83 includes a pair of vertical moving devices 84, and a pair of first molds 91a and 91b and a pair of first molds 91a and 91b on the upstream side thereof. It is equipped with two molds 92a and 92b. The specific use of each mold will be described later.

With reference to FIG. 13, the manufacturing process of the conventional paper container 70 will be briefly described from the upstream side.

First, the strip-shaped base paper 77 arranged in the base paper supply position B1 and wound in a roll shape is continuously supplied from the supply device 81 to the ruled line forming position B2.

Next, the supplied base paper 77 has a ruled line 75 for absorbing wrinkles during molding as shown in FIG. 13 (2) by the first molds 91a and 91b of the molding apparatus 83 at the ruled line forming position B2. Is formed in place. The base paper 77 on which the ruled line 75 is formed is then transferred to the punching / pressing position B3.

Further, in the transferred base paper 77, at the punching / pressing position B3, the blank sheet first has a substantially square shape or the like as shown in FIG. 13 (3) by the second dies 92a and 92b of the molding apparatus 83. Is punched into the desired shape. Next, the blank sheet is press-molded into a container shape by the second dies 92a and 92b at the same position. The paper container 70 is molded by such a flow.

In such a conventional paper container manufacturing apparatus 80, in order to improve the molding accuracy at the time of press molding by softening a part of the blank sheet before press molding into the container shape, the second mold is used. It has been conventionally practiced to incorporate heating means into 92a and 92b.

FIG. 14 is a schematic cross-sectional view of a portion including the second mold of the paper container manufacturing apparatus shown in FIG.

With reference to the figure, the second molds 91a and 91b include an upper mold member 93 and a lower mold member 94 that face each other, respectively. An elevating member 96 is arranged on the outer peripheral side of the upper die member 93, and a heating member 97 made of a heating heater or the like is embedded in the elevating member 96. A curling member 98 is arranged on the outer peripheral side of the lower mold member 94.

Japanese Unexamined Patent Publication No. 2011-212882

The operation of the second molds 91a and 91b provided with the heating member 97 at the time of molding as described above is as follows.

FIG. 15 is a schematic cross-sectional view of a portion of the paper container manufacturing apparatus shown in FIG. 12 including the second mold, showing a state during the heating process, and FIG. 16 is shown in FIG. It is a schematic cross-sectional view of the part including the 2nd mold of the paper container manufacturing apparatus, and is the figure which shows the state at the time of completion of a molding process.

First, referring to FIG. 15, the entire second mold 92a is lowered, and the lower end surface of the elevating member 96 of the second mold 92a and the upper end surface of the curling member 98 sandwich the transferred base paper 77 for a certain period of time. Stop. At this time, since the elevating member 96 is heated by the heating member 97, the portion sandwiched between the lower end surface of the elevating member 96 of the base paper 77 and the upper end surface of the curling member 98 is heated. This heated portion includes a part of the ruled line 75 shown in FIG. 12 (2).

Next, referring to FIG. 16, the elevating member 96 is further lowered so as to push down the curling member 98, and a blank sheet is punched out from the base paper 77 by a blade portion (not shown). After that, the second die 92a is further lowered at the same position, and the punched blank sheet is press-molded into a container shape by the pressurized end face of the upper die member 93 and the pressurized end face of the lower die member 94. After that, when the second die 92a is further raised at the same position, the edge winding 73 is formed at the end of the pressed blank sheet by the curl groove 99 formed by the elevating member 96 and the curling member 98. To.

FIG. 17 is a schematic diagram showing the relationship between the operating time of the heating means and the operating time of the molding means in the manufacturing process of the conventional paper container manufacturing apparatus as described above.

With reference to the figure, as described above, when molding a paper container, the heating process and the punching / pressing process (hereinafter referred to as "molding process") are performed in one mold, so they must be heated. After the process is completed and the blank sheet is heated to a predetermined temperature, the molding process proceeds. Then, when manufacturing one paper container, it always takes time to add the operating time α of the heating means and the operating time β of the punching / pressing means (hereinafter referred to as “molding means”).

Also, in the case of continuously molding a plurality of containers, the heating step of the later paper container (container 2) is started after the molding process of the previous paper container (container 1) is completed, so that the paper container is started. For each, the operating time α of the heating means and the operating time β of the molding means are inevitably required. Therefore, when manufacturing n paper containers, it can be said that the time T obtained by multiplying the total of the operating time α of the heating means and the operating time β of the molding means by the number n of the paper containers is always taken.

Here, when it is desired to mold more paper containers in a short time, for example, it is conceivable to shorten the operating time α of the heating means and the operating time β of the molding means. However, the minimum time required to manufacture a paper container of a certain quality is naturally determined by the material to be pressed and the configuration of the die to be processed. If the heating step and the molding step are not carried out over an appropriate time, the molding accuracy at the time of molding tends to decrease, and as a result, the possibility of producing a defective product increases.

The present invention has been made to solve the above problems, and to provide a paper container manufacturing apparatus, a paper container manufacturing method, and a paper container capable of stably mass-producing paper containers in a shorter time. With the goal.

In order to achieve the above object, the invention according to claim 1 is an apparatus for manufacturing a paper container by press forming, in which a base paper supply means for supplying a strip-shaped base paper and a corresponding position of the supplied base paper are provided. A ruled line forming means for forming a ruled line for absorbing wrinkles during molding, a first transfer means for transferring the base paper on which the ruled line is formed, a heating means for heating the transferred base paper, and a heated base paper for transfer. The second transfer means, the blank sheet punching means for punching a blank sheet having a desired shape including at least a part of the formed ruled lines from the transferred base paper, and the punched blank sheet are pressed at that position. The time required for processing in each of the ruled line forming means and the heating means is the same as the time required for processing in the blank sheet punching means and the pressing means, and the first transfer means and the second transfer means are provided. The transport means operates in synchronization with each other.
With this configuration, the time used to operate the ruled line forming means and the heating means does not affect the pressing time of the paper container by the blank sheet punching means and the pressing means.

The invention according to claim 2 is a method for manufacturing a paper container by press molding, in which wrinkles during molding are absorbed in a base paper supply step for supplying a strip-shaped base paper and a corresponding position of the supplied base paper. A rule line forming step for forming a ruled line, a first transfer step for transferring the base paper on which the ruled line is formed, a heating step for heating the transferred base paper, and a second transfer step for transferring the heated base paper. It is provided with a blank sheet punching step of punching a blank sheet having a desired shape including at least a part of formed ruled lines from the transferred base paper, and a pressing step of pressing the punched blank sheet at that position. The time required for processing in each of the ruled line forming step and the heating step is the same as the time required for processing in the blank sheet punching step and the pressing step, and the first transfer step and the second transfer step are synchronized with each other. It is what is executed.
With this configuration, the time used for the processing of the ruled line forming step and the heating step does not affect the pressing time of the paper container by the blank sheet punching step and the pressing step.

The invention according to claim 3 is a method for manufacturing a paper container, wherein the paper container is manufactured by using the paper container manufacturing apparatus according to claim 1 .

With this configuration, at least a part of the operating time zone of the heating means and the operating time zone of the molding means overlap.

The invention according to claim 4 is a paper container, which is obtained by the paper container manufacturing apparatus according to claim 1 .

With this configuration, at least a part of the operating time zone of the heating means and the operating time zone of the molding means overlap.

As described above, in the invention according to claim 1 , the time used for operating the ruled line forming means and the heating means does not affect the pressing time of the paper container by the blank sheet punching means and the pressing means. The quality and production efficiency of the container are improved.
In the invention according to claim 2, since the time used for the processing of the ruled line forming step and the heating step does not affect the pressing time of the paper container by the blank sheet punching step and the pressing step, the quality and production efficiency of the paper container. Is improved.

In the invention according to claim 3 , since at least a part of the operating time zone of the heating means and the operating time zone of the molding means overlap, the manufacturing time of the paper container is substantially shortened, and the production efficiency is improved. Can manufacture containers.

In the invention according to claim 4 , since at least a part of the operating time zone of the heating means and the operating time zone of the molding means overlap, the manufacturing time of the paper container is substantially shortened, and the production efficiency is improved. It becomes a container.

It is a schematic diagram which shows the manufacturing apparatus of the paper container by 1st Embodiment of this invention. It is the manufacturing apparatus of the paper container shown in FIG. 1, and is the schematic which shows the state during press working. It is a schematic diagram which shows the processing process of the base paper in the manufacturing apparatus of the paper container shown in FIG. It is the schematic sectional drawing of the part including the 2nd mold of the manufacturing apparatus of the paper container shown in FIG. It is a schematic cross-sectional view of the part including the 2nd die of the paper container manufacturing apparatus shown in FIG. 1, and is the figure which shows the state in the punching process. It is a schematic sectional view of the part including the 2nd mold of the paper container manufacturing apparatus shown in FIG. 1, and is the figure which shows the state at the time of completion of molding. It is a schematic diagram which shows the relationship between the operation time of the ruled line forming means, the operation time of a heating means, and the operation time of a molding means in the manufacturing process of the paper container manufacturing apparatus according to the first embodiment of the present invention. It is a schematic diagram which shows the relationship between the operation time of a heating means, and the operation time of a molding means in the manufacturing process in the manufacturing apparatus of the paper container by 1st Embodiment of this invention. It is a schematic diagram which shows the relationship between the operation time of a heating means, and the operation time of a molding means in the manufacturing process in the manufacturing apparatus of the paper container by the 2nd Embodiment of this invention. It is a schematic diagram which shows the relationship between the operation time of a heating means and the operation time of a molding means in the manufacturing process in the manufacturing apparatus of the paper container according to the 3rd Embodiment of this invention. It is a perspective view which shows the appearance shape of the conventional paper container. It is a schematic diagram which shows the manufacturing apparatus of the conventional paper container. It is a schematic diagram which shows the processing process of the base paper in the manufacturing apparatus of the paper container shown in FIG. FIG. 12 is a schematic cross-sectional view of a portion of the paper container manufacturing apparatus shown in FIG. 12 including a second mold. FIG. 12 is a schematic cross-sectional view of a portion of the paper container manufacturing apparatus shown in FIG. 12 including a second mold, and is a diagram showing a state during a heating process. FIG. 12 is a schematic cross-sectional view of a portion of the paper container manufacturing apparatus shown in FIG. 12 including a second mold, and is a diagram showing a state at the time of completion of molding. It is a schematic diagram which shows the relationship between the operation time of a heating means, and the operation time of a molding means in the manufacturing process in the conventional paper container manufacturing apparatus.

FIG. 1 is a schematic view showing a paper container manufacturing apparatus according to the first embodiment of the present invention.

With reference to the figure, first, the paper container 50 manufactured by the paper container manufacturing apparatus 10 according to this embodiment has the same configuration as the conventional paper container 70 shown in FIG.

Further, the paper container manufacturing apparatus 10 according to this embodiment is provided with a base paper 57 supply device 11 on the upstream side, which is the same as the conventional base paper supply means, and a molding device 13 on the downstream side. ing. The molding device 13 includes a pair of vertical moving devices 14, a pair of first dies 21a and 21b for forming ruled lines on the base paper 57 on the upstream side thereof, and a blank sheet of the base paper 57 on the downstream side. A pair of second dies 22a and 22b, which are a punching means and a pressing means, are attached, respectively.

Further, between the first molds 21a and 21b and the second molds 22a and 22b, a pair of heating members 23a and 23b made of a heater or the like which is a heating means for the base paper 57 are arranged.

The operation of the paper container manufacturing apparatus 10 of this embodiment will be described in order from the upstream side.

FIG. 2 is a schematic diagram showing a state of the paper container manufacturing apparatus shown in FIG. 1 during press working. Further, FIG. 3 is a schematic view showing a process of processing the base paper in the paper container manufacturing apparatus shown in FIG. 1, and FIG. 3 (1) shows a state immediately after the base paper supply position (A1), and (2). ) Indicates each state from the ruled line forming position (A2) to the punching / pressing position (A3), and (3) indicates the state immediately after the punching / pressing position (A3).

With reference to these figures, first, the strip-shaped base paper 57 arranged in the base paper supply position A1 and wound in a roll shape is coated on the surface by the supply device 11, and then downstream of the supply device 11. Is continuously supplied to the molding apparatus 13 of the above.

Next, the supplied base paper 57 is for absorbing wrinkles at the time of molding by the first molds 21a and 21b at the ruled line forming position A2 of the molding apparatus 13 as shown by A2 of FIG. 3 (2). The ruled line 55 is formed at a predetermined position. The base paper 57 on which the ruled line 55 is formed is then transferred to the heat processing position H by a first transfer means (not shown).

Further, the transferred base paper 57 is sandwiched by the heating members 23a and 23b at the heat processing position H. As a result, in H of FIG. 3 (2), almost the entire substantially square-shaped portion including the ruled line 55 as shown by the alternate long and short dash line is heated. By doing so, a wider area is heated than in the conventional heating process, which leads to improvement in molding accuracy during subsequent punching and pressing. The heated base paper 57 is then transferred to the punching / pressing position A3 by a second transfer means (not shown).

Further, the transferred base paper 57 is first heated by the second dies 22a and 22b at the punching / pressing position A3 as shown in A3 and (3) of FIG. 3 (2). 58 is punched into a desired shape such as a substantially square shape including at least a part of a ruled line as shown by a broken line. Next, at the same position, the punched blank sheet 58 is pressed into a container shape by the second dies 22a and 22b, and the paper container 50 is formed.

At this time, the time required for processing in each of the first dies 21a and 21b which are the ruled line forming means and the heating members 23a and 23b which are the heating means is the time required for the processing in each of the blank sheet punching means and the second die 22a which is the pressing means. , 22b is the same as the time required for processing.

As described above, the ruled line forming means, the heating means, and the punching / pressing means operate at independent positions. However, the first molds 21a and 21b and the second molds 22a and 22b are attached to the pair of vertical moving devices 14, and the heating members 23a and 23b are the first molds 21a and 21b and the second mold 22a. It is arranged between 22b and each means operates synchronously. Further, the entire transfer means including the first transfer means and the second transfer means also operate in synchronization with each other. Then, in the entire paper container manufacturing apparatus 10, the synchronized ruled line forming, heating, punching, and pressing processing processes and the synchronized transfer processes operate alternately.

Here, the specific operations of the second dies 22a and 22b at the punching / pressing position A3 of the paper container manufacturing apparatus 10 in this embodiment are as follows when compared with the conventional ones.

FIG. 4 is a schematic cross-sectional view of a portion of the paper container manufacturing apparatus shown in FIG. 1 including a second mold.

With reference to the figure, the second molds 22a and 22b according to this embodiment have a configuration in which the heating member 97 is removed from the conventional second molds 92a and 92b shown in FIG. 13, and the other members are conventional. Since it is common to the second molds 92a and 92b of No. 2, the explanation here is not repeated.

FIG. 5 is a schematic cross-sectional view of a portion of the paper container manufacturing apparatus shown in FIG. 1 including a second mold, and is a diagram showing a state during a punching process.

With reference to the figure, the second mold 22a descends from the state of FIG. 4 as in the conventional case. At that time, the transferred base paper 57 has already been heated by the heating members 23a and 23b. Therefore, the elevating member 36 and the curling member 38 of the second molds 22a and 22b sandwiching the base paper 57 do not need to be stopped for a certain period of time to heat the base paper 57, and continue to descend as they are, and the base paper 57 is held. Punch the blank sheet 58 from 57.

FIG. 6 is a schematic cross-sectional view of a portion of the paper container manufacturing apparatus shown in FIG. 1 including a second mold, and is a diagram showing a state at the time of completion of molding.

With reference to the figure, the second mold 22a is further lowered from the position where the blank sheet 58 is punched out, and the punched blank sheet 58 is the pressure end surface of the upper die member 33 of the second mold 22a and the second mold. It is press-molded into a container shape by the pressurized end face of the lower die member 34 of the die 22b. After that, when the second die 22a is further raised at the same position, the curl formed by the elevating member 36 and the curling member 38 of the second dies 22a and 22b is formed at the end of the pressed blank sheet 58. The edge winding 53 is formed by the groove 39.

FIG. 7 is a schematic view showing the relationship between the operating time of the ruled line forming means, the operating time of the heating means, and the operating time of the molding means in the manufacturing process of the paper container manufacturing apparatus according to the first embodiment of the present invention. Is.

In FIG. 7, the description of the operating time of the first transfer means and the second transfer means is omitted.

With reference to the figure, as described above, the operating time γ of the ruled line forming means derived from the time required for processing in the ruled line forming means and the operating time α of the heating means derived from the time required for processing in the heating means. Is the same as the operating time β of the molding means, which is the time required for processing in the blank sheet punching means and the pressing means (hereinafter referred to as “molding means”). Further, the ruled line forming process, the heating process, and the punching / pressing process (hereinafter referred to as “molding process”) operate in synchronization with each other.

That is, when the portion related to the paper container (container 1) at the tip of the base paper goes through the ruled line forming step and the heating step and the molding process is started, the part related to the paper container (container 2) after the base paper is the heating step. Will start. Further, the portion related to the paper container (container 3) after the base paper starts the ruled line forming step. Then, when manufacturing the first paper container, it always takes time to add the operating time γ of the ruled line forming means, the operating time α of the heating means, and the operating time β of the molding means. When a plurality of paper containers are continuously molded, the heating step of the container 2 and the ruled line forming step of the container 3 are performed during the molding step of the container 1, and after the molding step of the container 1 is completed, the container 2 is formed. The molding process and the heating process of the container 3 are started. As a result, when manufacturing the second and subsequent paper containers, it takes substantially only the operating time β of the molding means. Therefore, when manufacturing n paper containers, the operating time γ of the ruled line forming means of the first container, the operating time α of the heating means, and the operating time β of the molding means are added. It can be said that T ₁ is obtained by further adding the time obtained by multiplying the operating time β of the molding means by the number of the second and subsequent paper containers (n-1).

As described above, in the overall manufacturing time, the operating time γ of the ruled line forming means and the operating time α of the heating means do not affect the operating time β of the molding means, so that the quality and production efficiency of the paper container are improved. It becomes a thing.

For comparison with the conventional manufacturing apparatus, only the operating time α of the heating means and the operating time β of the molding means will be extracted and described further.

FIG. 8 is a schematic diagram showing the relationship between the operating time of the heating means and the operating time of the molding means in the manufacturing process of the paper container manufacturing apparatus according to the first embodiment of the present invention.

With reference to the figure, when the portion related to the paper container (container 1) at the tip of the base paper goes through the heating step and the molding process is started, the part related to the paper container (container 2) after the base paper is the heating step. Will start. Then, when manufacturing the first paper container, it always takes time to add the operating time α of the heating means and the operating time β of the molding means, but a plurality of paper containers are continuously formed. In the case of molding, the heating step of the container 2 is performed during the molding step of the container 1, and after the molding step of the container 1 is completed, the molding step of the container 2 and the heating step of the container 3 are started. As a result, when manufacturing the second and subsequent paper containers, it takes substantially only the operating time β of the molding means. Therefore, the time T ₂ required for manufacturing n paper containers is the operating time of the molding means in addition to the operating time α of the heating means of the first container and the operating time β of the molding means. It can be said that it takes time to add the time obtained by multiplying β by the number of the second and subsequent paper containers (n-1).

That is, the time T ₂ required for manufacturing n paper containers is
T ₂ = (α + β) + β (n-1) = α + βn.

On the other hand, the time T shown in FIG. 17 in the conventional case is
T = n (α + β) = αn + βn.

Therefore,
T ₂ −T = (α + βn) − (αn + βn) = −α (n-1), from which the relationship T2 = T ₋ α (n-1) is derived.

This means that the time required for the second and subsequent heating steps of the paper container is substantially unnecessary as compared with the conventional manufacturing apparatus, and as a result, it can be said that the time required for the entire manufacturing is shortened.

As described above, even when only the heating means and the molding means are considered, the operating time α of the heating means does not affect the operating time β of the molding means in the overall manufacturing time, so that the production efficiency is further improved. It becomes a thing.

FIG. 9 is a schematic diagram showing the relationship between the operating time of the heating means and the operating time of the molding means in the manufacturing process of the paper container manufacturing apparatus according to the second embodiment of the present invention.

Since the configuration of the paper container manufacturing apparatus according to the second embodiment is basically the same as that of the first embodiment, the description here will not be repeated, and the differences will be mainly described. do.

With reference to the figure, the operating time α of the heating means according to the second embodiment is set to be longer than the operating time β of the molding means. With such a setting, the base paper is heated evenly over a long period of time as a whole, and the softness and moisture more suitable for molding are retained, so that the molding accuracy of the paper container is further improved.

For comparison with the conventional manufacturing apparatus, the description of the operating time of the ruled line forming means is omitted, and the relationship between the heating means and the molding means will be described.

First, when the portion related to the paper container (container 1) at the tip of the base paper starts the molding process through the heating step, the portion related to the paper container (container 2) after the base paper starts the heating process. Is similar to the first embodiment. Further, when manufacturing the first paper container, it is the same as in the first embodiment that it always takes time to add the operating time α of the heating means and the operating time β of the molding means.

Next, when a plurality of paper containers are continuously molded, the heating step of the container 2 is started during the molding step of the container 1, but the operating time α of the heating means is larger than the operating time β of the molding means. Since it is long, the molding process of the container 2 does not start immediately after the molding process of the container 1 is completed, but after waiting for the heating process of the container 2 to be completed, the molding process of the container 2 and the heating step of the container 3 are waited for. Is started. Therefore, a waiting time x is generated after the molding step, and the heating means operates in a time including at least a part of the operating time zone of the molding means.

The time obtained by adding the standby time x to the operating time β of the molding means is the same as the operating time α of the heating means.

As a result, when manufacturing the second and subsequent paper containers, it takes substantially time to add the waiting time x to the operating time β of the molding means. Therefore, the time T ₃ required for manufacturing n paper containers is the sum of the operating time α of the heating means of the first container and the operating time β of the molding means, and the operating time β of the molding means. It can be said that it takes a time obtained by further adding the time obtained by multiplying the total time of the waiting time x and the number of the second and subsequent paper containers (n-1).

That is, the time T ₃ required for manufacturing n paper containers is
T ₃ = (α + β) + (β + x) (n-1) = (α + β) + α (n-1) = αn + β.

On the other hand, the time T shown in FIG. 17 in the conventional case is the same as in the first embodiment.
T = n (α + β) = αn + βn.

Therefore,
T ₃ −T = (αn + β) − (αn + βn) = −β (n-1), from which the relationship T ₃ = T—β (n-1) is derived.

This means that, compared to the conventional manufacturing equipment, the time corresponding to the molding step in the second and subsequent heating steps of the paper container is substantially unnecessary, and as a result, the time related to the entire manufacturing is required. Can be said to be substantially shorter than the conventional one.

As described above, since at least a part of the operating time α of the heating means and the operating time β of the molding means overlap, the manufacturing time of the paper container is substantially shortened, and the production efficiency is improved.

FIG. 10 is a schematic diagram showing the relationship between the operating time of the heating means and the operating time of the molding means in the manufacturing process of the paper container manufacturing apparatus according to the third embodiment of the present invention.

Since the configuration of the paper container manufacturing apparatus according to the third embodiment is basically the same as that of the first embodiment, the description here will not be repeated, and the differences will be mainly described. do.

With reference to the figure, the operating time α of the heating means according to the third embodiment is set to be shorter than the operating time β of the molding means. Since the base paper tends to warm up quickly with a large-capacity heater or the like, such time adjustment may be performed in order to obtain a softness and a water retention amount more suitable for molding.

For comparison with the conventional manufacturing apparatus, the description of the operating time of the ruled line forming means is omitted, and the relationship between the heating means and the molding means will be described.

First, when the molding process is performed on the portion related to the paper container (container 1) at the tip of the base paper, the heating step is performed on the portion related to the paper container (container 2) after the base paper. Is similar to the first embodiment. Further, when manufacturing the first paper container, it is the same as in the first embodiment that it always takes time to add the operating time α of the heating means and the operating time β of the molding means.

Next, when a plurality of paper containers are continuously molded, the heating step of the container 2 is started during the molding step of the container 1, but the operating time α of the heating means is larger than the operating time β of the molding means. Since it is short, the heating step of the container 2 is performed from the middle of the molding process of the container 1 to the completion of the molding process. Similarly, the heating step of the container 3 is started from the middle of the molding process of the container 2. Therefore, the heating means operates within the operating time of the molding means.

As a result, when manufacturing the second and subsequent paper containers, the operating time β of the molding means is substantially longer than the operating time α of the heating means. Therefore, the time T ₄ required for manufacturing n paper containers is the operating time of the molding means in addition to the operating time α of the heating means of the first container and the operating time β of the molding means. It can be said that it takes time to add the time obtained by multiplying β by the number of the second and subsequent paper containers (n-1).

That is, the time T ₄ required for manufacturing n paper containers is
T ₄ = (α + β) + β (n-1) = α + βn.

On the other hand, the time T shown in FIG. 17 in the conventional case is the same as in the first embodiment.
T = n (α + β) = αn + βn.

Therefore,
T ₄ −T = (α + βn) − (αn + βn) = −α (n-1), from which the relationship T ₄ = T−α (n-1) is derived.

This means that, as compared with the conventional manufacturing apparatus, the time required for the heating step of the second and subsequent paper containers is substantially unnecessary as in the first embodiment, and as a result, the entire manufacturing is performed. It can be said that the time required for the above is also shortened.

As described above, since at least a part of the operating time α of the heating means and the operating time β of the molding means overlap, the manufacturing time of the paper container is substantially shortened, and the production efficiency is improved. Further, in the overall manufacturing time, the operating time α of the heating means does not affect the operating time β of the molding means, so that the production efficiency is further improved.

In each of the above embodiments, the object to be pressed has a structure in which a strip-shaped base paper is punched into a blank sheet and molded. However, if a paper container can be manufactured, the object to be pressed is acquired. The means is not limited to that, and other methods may be used.

Further, in each of the above embodiments, the blank sheet is punched out from the strip-shaped base paper, but the present invention is not limited to this, and another method such as preparing a blank sheet formed into a desired shape from the beginning can be used. The blank sheet acquisition means may be provided.

Further, in each of the above-described embodiments, the molding means is composed of a blank sheet punching means and a pressing means, but the molding means is not limited to this. It may be composed of the blank sheet acquiring means and the pressing means as described above, or may be by another means as long as it processes a heated material to form a paper container. good.

Further, in each of the above-described embodiments, since the heating means is independently provided for the molding before heating, the molding means is not provided with the heating means. On the other hand, in order to add a heating step for the purpose of improving the shape retention after molding, a heating member may be additionally provided in the molding means.

Further, in each of the above-described embodiments, the heating step and the molding step are continuously performed, but the present invention is not limited to this, and the heating means may be arranged in front of the ruled line forming means. Further, the heating means may be incorporated in the ruled line forming means.

Further, in each of the above-described embodiments, the heating portion is performed on the entire substantially square shape, but the heating portion is not limited to this, and only a specific portion may be heated.

Further, in the above-mentioned third embodiment, the heating step is started from the middle of the molding step at a time zone corresponding to the completion of the molding step, but the present invention is not limited to this. The molding process and the heating process may be started at the same time, and after heating for a certain period of time, the molding process may be waited until the molding process is started.

Further, in each of the above-described embodiments, the first mold, which is a ruled line forming means, and the second mold, which is a molding means, are attached to a pair of vertical moving devices, and the heating means is a heating means arranged between them. The members had an independent configuration, but are not limited to this. The heating member may also be attached to the vertical moving device, or conversely, each means may be attached to an independent moving device.

Further, although each of the above-described embodiments relates to a paper container manufacturing apparatus, it is also possible to use the above-mentioned embodiments of each of the above-described embodiments for manufacturing a paper container as an embodiment. It can be applied in the same way.

Further, although each of the above embodiments relates to the paper container manufacturing apparatus, the same can be applied to the embodiment of the paper container obtained by the paper container manufacturing apparatus of each of the above embodiments. ..

10 ... Paper container manufacturing equipment 11 ... Supply equipment 21a, 21b ... First mold 22a, 22b ... Second mold 23a, 23b ... Heating member 50 ... Paper container 55 ... Ruled line 57 ... Base paper Note that the same reference numerals are used in each drawing. Indicates the same or equivalent part.

Claims (4)

It is a press-molded paper container manufacturing device.
A base paper supply means for supplying strip-shaped base paper, and
A ruled line forming means for forming a ruled line for absorbing wrinkles during molding at a corresponding position of the supplied base paper, and a ruled line forming means.
The first transfer means for transporting the base paper on which the ruled lines are formed, and
The heating means for heating the transferred base paper and
A second transfer means for transferring the heated base paper, and
A blank sheet punching means for punching a blank sheet having a desired shape including at least a part of the formed ruled lines from the transferred base paper.
It is provided with a pressing means for pressing the punched blank sheet at that position.
The time required for processing in each of the ruled line forming means and the heating means is the same as the time required for processing in the blank sheet punching means and the pressing means, and the first transfer means and the second transfer means. A paper container manufacturing device that operates in synchronization with the means. It is a method of manufacturing paper containers by press molding.
The base paper supply process that supplies strip-shaped base paper, and
A ruled line forming step of forming a ruled line for absorbing wrinkles during molding at a corresponding position of the supplied base paper, and a ruled line forming step.
The first transfer step of transferring the base paper on which the ruled lines are formed, and
The heating step of heating the transferred base paper and
The second transfer step of transferring the heated base paper and
A blank sheet punching step of punching a blank sheet having a desired shape including at least a part of the formed ruled lines from the transferred base paper.
It is provided with a pressing process for pressing the punched blank sheet at that position.
The time required for processing in each of the ruled line forming step and the heating step is the same as the time required for processing in the blank sheet punching step and the pressing step, and the first transfer step and the second transfer step. A method of manufacturing a paper container that is executed in synchronization with the process. A method for manufacturing a paper container, wherein the paper container is manufactured by using the paper container manufacturing apparatus according to claim 1. A paper container obtained by the paper container manufacturing apparatus according to claim 1.

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